Singapore agency Wunderman & Comwerks created Olympic-themed site Defend the Flame to get people tweeting about the Games. Based on the premise that London's grey weather needs fuel to keep the flame alive, the site features a "social flame" that reacts to tweets, clicks and real-time weather conditions in London. Visitors to the site need to keep clicking and tweeting with the hashtag #keepitburning to stop the drizzle from putting it out.
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